Advancement in additive manufacturing & numerical modelling considerations of direct energy deposition process

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Abstract

The development speed and application range of the additive manufacturing (AM) processes, such as selective laser melting (SLM), laser metal deposition (LMD) or laser-engineering net shaping (LENS), are ever-increasing in modern advanced manufacturing field for rapid manufacturing, tooling repair or surface enhancement of the critical metal components. LMD is based on a kind of directed energy deposition (DED) technology which ejects a strand of metal powders into a moving molten pool caused by energy-intensive laser to finally generate the solid tracks on the workpiece surface. Accurate numerical modelling of LMD process is considered to be a big challenge due to the involvement of multiple phase changes and accompanied mass and heat flows. This paper overviewed the existing advancement of additive manufacturing, especially its sub-category relating to the DED. LMD process is analyzed in detail and subsequently broken down to facilitate the simulation of each physical stage involved in the whole process, including powder transportation and dynamics, micro-mechanical modelling, formation of deposited track and residual stress on the substrate. The proposed modelling considerations and a specific CFD model of powder feeding will assist in accurately simulating the DED process; it is particularly useful in the field of aerospace manufacturing which normally has demanding requirement on its products.
Original languageEnglish
Title of host publicationProceeding of the 14th International Conference on Manufacturing Research
Subtitle of host publicationAdvances in Manufacturing Technology XXX
EditorsYee Mey Goy, Keith Case
Place of PublicationAmsterdam
PublisherIOS Press
Pages104-109
Number of pages6
ISBN (Electronic)978-1-61499-668-2
ISBN (Print)978-1-61499-667-5
DOIs
Publication statusPublished - 6 Sep 2016
EventICMR Series Conferences (International Conference on Manufacturing Research) - Glasgow, Durham, Warwick, London, Leicester, Liverpool, United Kingdom
Duration: 8 Sep 2003 → …

Publication series

NameICMR

Conference

ConferenceICMR Series Conferences (International Conference on Manufacturing Research)
CountryUnited Kingdom
CityGlasgow, Durham, Warwick, London, Leicester, Liverpool
Period8/09/03 → …

Keywords

  • additive manufacturing (AM)
  • laser metal deposition (LMD)
  • direct energy deposition (DED)

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  • Cite this

    Zeng, Q., Xu, Z., Tian, Y., & Qin, Y. (2016). Advancement in additive manufacturing & numerical modelling considerations of direct energy deposition process. In Y. M. Goy, & K. Case (Eds.), Proceeding of the 14th International Conference on Manufacturing Research: Advances in Manufacturing Technology XXX (pp. 104-109). [18] (ICMR). Amsterdam: IOS Press. https://doi.org/10.3233/978-1-61499-668-2-104